About Product:Brand: neutral transmission range: 10 meters function: support music processing custom: is printed LOGO: can be bluetooth protocol: 4.1 track: stereo way of use: whether earplugs type single and double ears: bilateral stereo applicable gift-giving occasions: advertising promotion, business gifts, awards, fairs, the anniversary celebration, opening ceremony of colors: red, black, gold, green downstream of the main platforms: speed sell tong, amazon, wish, ebay main sales regions: Europe, North America, South America, southeast Asia, northeast Asia, the Middle East, Africa, whether cross-border supply of goods: is support for custom: support